Product Description; Fig. 2 Ep1908-0002 - Beckhoff EP1908 Operating Instructions Manual

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Product description

4.1 EP1908-0002
Fig. 2: EP1908-0002
The EP1908-0002 is an EtherCAT Box with digital inputs for 24 V
The EtherCAT Box has eight fail-safe inputs.
In addition to the possibility to read potential-free contacts, the EP1908-0002 also supports the connection of
encoders with OSSD signals whose test pulse length does not exceed 350 µs and of safety mats that
operate based on the cross-circuit principle.
Frequency measurement is also supported, in order to enable standstill and speed monitoring. The
frequency below which a logical 1 is reported at the input is specified in steps of 0.1 Hz. The module
supports a minimum frequency of 2 Hz and a maximum frequency of 500 Hz. Frequencies above of 500 Hz
result in a diagnostic message for the module. In this case all inputs are set to safe state (logical 0). This
message can be reset through a rising edge of the safe output signal ErrAck of the EP1908-0002.
With a two-channel connection, the EP1908-0002 meets the requirements of EN 61508-1:2010 SIL 3 and
DIN EN ISO 13849-1:2006 (Cat 4, PL e).
The control voltage U supplies the module electronics. The sensors (test pulse outputs) are supplied from
S
the control voltage U .
P
The TwinSAFE EtherCAT Box has the typical design of an EtherCAT Box.
EP1908
encoders or for potential-free contacts.
DC
Version: 3.0.0
Product description
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